1. Contribution from the Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan, PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China, and Biophysics Section, Division of Cell and Molecular Biology, Faculty of Natural Sciences, Imperial College London, South Kensington Campus, London...